Priyankur’s present age is seven years less than thrice the age of his cousin Rihana.
Sixteen years from now Priyakur’s age will be 150% of that of Rihana. What is Priyankur’s present age (in years)?

Let the present age of Priyanka be P and Rihana be R.

Priyankur’s present age is seven years less than thrice the age of his cousin Rihana => P = 3R - 7 -------------(1)

Sixteen years from now Priyakur’s age will be 150% of that of Rihana => P + 16 = $$\frac{150}{100} \times (R + 16)$$ --------------(2)

Solving second equation ,

P + 16 = $$\frac{150}{100} \times (R + 16)$$

P + 16 = $$\frac{3}{2}R + 24$$

P = $$\frac{3R}{2} + 8$$ ------------(3)

Now , equate (1) and (3),

$$\frac{3R}{2} + 8$$ = 3R -7 

R = 10

Putting the value of R in (1) , 

P = 30 -7 = 23

So , the answer would be option c)23.