Aamish's birthday on 25 $$^{th}$$​February 2020 was a Tuesday. Which day of the week was his brother's birthday, which was on 13$$^{th}$$​ May 2020?

Aamish's birthday on February 25th, 2020, was a Tuesday.

The total days from February 25th to May 13th is 78 days.
78 days ÷ 7 = 11 weeks + 1 extra day.

Starting from Tuesday, 1 day later is Wednesday.

So, Aamish's brother's birthday on May 13th, 2020, was a Wednesday.

Thus, correct option is (a)