Correct Answer: TFHGVHY

Solution : Given:
FGH_Y_G_U UYF_H_YFG_W_

To complete the series, divide the series – FGH_Y / _G_UY / F_H_Y / FG_W_

Let's check each option –
First option: UFHGVIY; FGH U Y / F G H UY / F G H V Y / FG I W Y (No pattern is repeated)
Second option: TGHGVHY; FGH T Y / G G H UY / F G H V Y / FG H W Y (No pattern is repeated)
Third option: TFHGVHY; FGH T Y / F G H UY / F G H V Y / FG H W Y (FGH_Y is repeated and the fourth letter is increased by one)
Fourth option: UGHGVHY; FGH U Y / G G H UY / F G H V Y / FG H W Y (No pattern is repeated)

So, only the third option follows a pattern. Hence, the third option is correct.