The probability that a leap year selected at random contains 53 sunday is -

Number of days in a leap year = 366.

Number of Sundays in a leap year

= 366 / 7 = 52 Sundays + 2 days

The remaining two days can be:

Sunday and Monday

Monday and Tuesday

Tuesday and Wednesday

Wednesday and Thursday

Thursday and Friday

Friday and Saturday

Saturday and Sunday

Number of outcomes with Sundays = 2

And the number of possible outcomes = 7

Thus,

The correct option is (D) 2 / 7.