@Pangaj Don't be like me 1) You can take multiple linked FDs as you wish. Your thinking of 5 x 2L linked FDs is quite possible.
2) By keeping sufficient cash balance in the Savings Account, we can avoid breaking of FD(s). For example, keep Rs.2 lakhs in the Savings A/c and 5 x 2L FDs, apply for IPO up to 11.75 lakhs. In case of allotment for Rs.1.4 lakhs, the amount will be debited from your Savings A/c and balance will be unblocked. Your FD(s) are intact and the amount in the Savings A/c will become Rs.0.6 lakh.
3) Even if there is insufficient cash balance in your Savings A/c, you can avoid breaking of FD by making Fund Transfer from some other A/c. But you have to take quick action before the Bank comes into action for honoring the debit instructions received.