I came across this question in an exam and there is an option to challenge the answers so please suggest me if my perspective is right or wrong? the answer is given to be the option (C) but I have chosen option (d) in the exam.
I don't understand exactly why he mentioned that the sign of emf will be negative when the loop is entering the field. I guess they did so because the formula for emf in a loop is E=-(rate of change of flux per time) and since the flux is increasing the emf should be more negative... but that approach is wrong because it never mentioned anything about the direction in which the emf causes the current.
Think of it this way, if the direction the filed is pointing outwards instead of into the paper(as given it the question) the direction of emf should be opposite to what it was before and so should be of +ve sign but as per the paper setters logic this seems to negative sign in this case also because field is increasing this time also. so, I feel both option c and d should be considered correct.