The accompanying diagram shows the uterine tubes of four women (P,Q,R and S)

In which two women is fertilisation impossible at present ?

Options

A. P and Q
B. Q and R
C. R and S
D. S and P

Answer

C

Explanation

Figure 'R' is showing complete blockage of Fallopian tubes and figure 'S' is showing tubecomy which is a surgical method of contraception in female. When both the Fallopian tubes are blocked or cut and tied, there will be no transport of gametes and thus no fertilisation.