When a neutral body is rubbed and it becomes positively charged, it must have:

Explanation

When a neutral body becomes positively charged, it means it has lost electrons. Electrons are negatively charged, so removing some from a neutral atom or molecule leaves it with a net positive charge due to the unchanged number of protons. Option A is correct because losing electrons results in a positive charge. Option B is incorrect because losing protons would change the element entirely and not just the charge. Option C is incorrect because gaining protons is not feasible in this context and would also change the element. Option D is incorrect because gaining electrons would make the body negatively charged, not positively.