Correct Answer: a -2 b-3 c-4 d-1

Solution : The correct option is a -2 b-3 c-4 d-1.

 A Willy-Willy is a tropical cyclone that occurs in Australia. It is a small, intense cyclone that forms over land and can cause damage to property and crops.  A typhoon is a large, intense tropical cyclone that occurs in the western Pacific Ocean mostly China. It can cause widespread damage to property and infrastructure. A Mistral is a cold, dry wind that blows from the north in southern France. It can cause strong winds and dust storms. A hurricane is a large, intense tropical cyclone that occurs in the Atlantic Ocean and northeastern Pacific Ocean mostly West Indies. It can cause widespread damage to property and infrastructure.

Correct Answer: Secretion of enzymes

Solution : The correct option is the Secretion of enzymes.

The nucleoside triphosphate adenosine triphosphate, or ATP, is a coenzyme utilized by cells and is frequently referred to as the "molecular unit of currency" of intracellular energy transfer. Simply put, it is energy for use and storage at the cellular level.

Correct Answer: 7 : 15 : 49

Solution : Let's check the given options –
First option: (11 : 21 : 121)→11 + (11 – 1) = 11 + 10 = 21; 11² = 121
Second option: (2 : 3 : 4)→2 + (2 – 1) = 2 + 1 = 3; 2² = 4
Third option: (7 : 15 : 49)→7 + (7 – 1) = 7 + 6 = 13 ≠ 15; 7² = 49
Fourth option: (9 : 17 : 81)→9 + (9 – 1) = 9 + 8 = 17; 9² = 81

Therefore, only the third option does not follow the pattern of the others. Hence, the third option is correct.

Correct Answer: 5 m

Solution : As per the given information, the movement of X will look as follows –

According to the above figure, the distance that X has traveled from his original position = AE = 5 m.

Hence, the first option is correct.

Correct Answer: 73 : 116

Solution : Let the capacity of each bottle be $x$ units.
Bottle 1 has milk : water = 2 : 5
Bottle 2 has milk : water = 3 : 4
Bottle 3 has milk : water = 4 : 5
Bottle 1 contains milk = $\frac{2x}{7}$, water = $\frac{5x}{7}$
Bottle 2 contains milk = $\frac{3x}{7}$, water = $\frac{4x}{7}$
Bottle 3 contains milk = $\frac{4x}{9}$, water = $\frac{5x}{9}$
When mixed, the ratio of milk and water is:
$= (\frac{2x}{7}+\frac{3x}{7}+\frac{4x}{9}) : (\frac{5x}{7}+\frac{4x}{7}+\frac{5x}{9})$
$= (\frac{18x+27x+28x}{63}) : (\frac{45x+36x+35x}{63})$
$= 73: 116$
Hence, the correct answer is 73 : 116.

Correct Answer: poet

Solution : The correct answer is a poet.

Amir Khusrau was a famous poet, scholar, and musician in the Indian subcontinent during the 13th and 14th centuries. He was originally from Central Asia but spent most of his life in the Delhi Sultanate. Khusrau wrote extensively in Persian and is widely recognised for his contributions to the cultural, and literary heritage of the region.

Correct Answer: Mother’s father

Solution : Given:
A # B ⇒ A is the brother of B
A @ B ⇒ A is the daughter of B
A & B ⇒ A is the husband of B
A % B ⇒ A is the wife of B

As per the given information, the family tree will be as follows –

Here, the quadrilateral represents the male, and the circular figure represents the female in the figure.

So, H is D's mother’s father (maternal grandfather). Hence, the first option is correct.

Correct Answer: Santoor

Solution : The correct option is Santoor

Pandit Shiv Kumar Sharma was born in 1938 in Jammu. He was a famous Indian musician and Santoor player. It is believed that it was hiim who first used Santoor and included it in Indian classical music. He partnered with Indian flautist Hariprasad Chaurasia and composed music for numerous Indian movies under the moniker Shiv-Hari. 

Correct Answer: 21

Solution : Given:
5, 9, 13, 17, ?, 25

In the given series, add 4 to the previous term to get the next term.
5 + 4 = 9; 9 + 4 = 13; 13 + 4 = 17; 17 + 4 = 21; 21 + 4 = 25

So, the missing number is 21. Hence, the third option is correct.

Correct Answer: uncontrolled fusion reaction

Solution : The correct answer is uncontrolled fusion reaction.

The theory of uncontrolled nuclear fusion underpins a hydrogen bomb. The process by which the nuclei of two light atoms join to generate a new nucleus is known as nuclear fusion.