Pls clarify

Hai pls clarify my doubt,am eligible for ca final exams in May 14 but my preparation is not upto the mark,my principal is not willing to give leave from january he may give from feb onwards due to the time constraint am planning to give only 1 group but seniors are suggesting to forego May attempt & give 2 grops in Nov attempt b'cos if i give 1 group in May & in Nov i need to have leave for my 2nd group but my articles are going to end in october so i may endup in shortage of time for 2nd group..am in dilemma whether to give in May or nov...