Correct Answer: 17 – 9 – 17 – 15 – 6

Solution : Given:
CLOCK is written as 4 – 13 – 17 – 4 – 12.

Write the position values of the letters of CLOCK, and then add 2 to the position value of O, and add 1 to the position values of the remaining letters to obtain the required code –
C→3; L→12; O→15; C→3; K→11
Now, add 2 to the position value of O, and add 1 to the position values of the remaining letters –
C→3 + 1 = 4; L→12 + 1 = 13; O→15 + 2 = 17; C→3 + 1 = 4; K→11 + 1 = 12
Thus, CLOCK is coded as 4 – 13 – 17 – 4 – 12.
Similarly, follow the same pattern for PHONE –
P→16; H→8; O→15; N→14; E→5
Now, add 2 to the position value of O, and add 1 to the position values of the remaining letters –
P→16 + 1 = 17; H→8 + 1 = 9; O→15 + 2 = 17; N→14 + 1 = 15; E→5 + 1 = 6

So, PHONE is coded as 17 – 9 – 17 – 15 – 6. Hence, the third option is correct.