Please help with this stock portfolio

This is the portfolio of my wife, who inherited it after my mother-in-law's sad and sudden demise.
This is a long term portfolio, Stocks will be held for 1 to 5 years or more before being sold as it is not possible for me to track all stocks and buy/sell every month.

Some cash is also there to be invested. I am not sure whether to invest now or wait; and to invest in existing stocks or in new ones.

I understand that 87% of the portfolio consists of only 3 stocks and some holdings have very small value.

Please have a look and give you valuable opinion and advice.

Thanks.

If you are passive investor, it is better to average out the mid/small cap stocks and exit. You can use the cash currently in hand for that. You can hold the largecap stocks safely for the long term. The cash that comes out of exits from small/midcap can be used to gradually invest in the large cap stcks.

You are right, I am not going to trade actively.
I have decided to sell the last five on the list, and buy more of NMDC. Is it ok?
A few of the large caps also have very small representation.