Brainostalgic (Day 1)

Why to solve a puzzle?

Solving of puzzles is interesting, as these contain that extra thing required to think beyond the traditional approach of solving the mathematics, science, logical and other reasoning problems. Let us start with a simple puzzle. Hope you will be able to answer it well. Please do solve it and share your answer in the comments section.

Puzzle

In a guessing contest for contestants, four non-transparent boxes were shown. It was told that each of the boxes contain a different kind of fruit. Fruits were apples, bananas, oranges and pears. The participants have to guess what is contained in the boxes without looking into them. There were 123 participants in the contest. 43 of them were not able to guess what is contained even in a single box correctly. 39 of them could guess one box correctly. 31 guessed two boxes correctly and were not able to correctly guess the other two. 

Can you tell how many people could identify three boxes? Also tell how many could guess all the four boxes correctly? NOTE: two answers are required.

Answer in the comments section below! Brainostalgic... hai na.