I suggest you to save an emergency fund with a size of up to 6-month of your monthly spending, i.e. RM12,000 and put this amount into FD. About allocation of the FD, you could divide RM12,000 equally into 2 portions and put each into 1-month roll over and 3-month roll over.

Anyway, in my opinion, with such a small amount of FD (RM12k) and such a small difference FD rate between 1-month and 3-month, if I were you I would put all the emergency fund into 1-month roll over FD. The purpose of putting money into FD is for liquidity and not  for long term for 3-month/12-month. If you want to earn more return, you should aim on mutual funds, equities or properties but FD.