Investing in Section 54EC Capital Gains Bonds

I would be investing in Section 54EC capital gains bonds, from the proceedings of sale of a property.

There are 4 such bonds based on my knowledge.

  1. I wish to know the Pros and Cons of each of these 4 bonds

  2. Should the investment be divided in each of the 4?

  • Rural Electrification Corporation Limited or REC bonds

  • National Highway Authority of India or NHAI bonds

  • Power Finance Corporation Limited or PFC bonds

  • Indian Railway Finance Corporation Limited or IRFC bonds