From statement (A) alone,

*R* =

*P* + 2

So both

*P* and

*R* are odd or both are even.

If both are odd then last digit of

*S* cannot be 2.

If both are even then their last digits can be of the form (

*P*,

*R*) = (0, 2), (2, 4), (4, 6), (6, 8) or (8, 0)

For none of these pairs the last digit of

*S* is 2.

∴ Statement A alone is sufficient to answer the question.

From statement (B) alone,

*P* is an odd prime number.

But we do not know anything about

*R*.

∴ We cannot conclude that the last digit of

*S* is 2 or not.

[For

*P* = 7 and

*R* = 6,

*S* = 7 × 6 = 42 (last digit of

*S* is 2)

But, for

*P* = 7 and

*R* = 9,

*S* = 7 × 9 = 63 (last digit of

*S* is not 2)]

∴ Statement B alone is not sufficient to answer the question.

Hence, option 1.