Sayyed Mohammad Al-Musawi, Sayyed Mohammad al-Musawi is originally from Iraq and heads up the World Ahlul Bayt Islamic League in London. Other than being involved in various humanitarian projects, he frequently responds to... Answered 10 months ago

If a person deliberately did not fast any day of the Month of Ramadhan, he has committed a sinful act and he must that day as Qadha and he must fast two months or feed sixty poor Momineen for not fasting that day.

Exams is not be a valid reason to leave fasting, so, the above rule is applicable.