Puzzle of the week #380

Level: 
4-Rook
Chess Diagram: 

[Event "Puzzle #380"][Date "2020.03.08"][Result "0-1"][SetUp "1"][FEN "8/8/6p1/4pk2/1r2np2/8/1B3PKP/4R3 w - - 0 56"]56.Bxe5

This is the end of a rapid game played between two GMs years ago in the FIDE World Championship Knockout tournament. White was down a pawn and after some quick thinking, he decided to get the pawn back using an absolute pin (see move). Your tasks:
a) Was white's decision the correct one?
b) What is the most likely continuation after 56. Bxe5 ...?

Total available points for this puzzle is 15. The answers will be published next time together with puzzle #381.

Puzzle #379 solution:
Study by A Wotava. This week's best answers are by the top scorers. This time they were Lucas and Joey.

[Event "Puzzle #379"][Date "2020.02.02"][Result "1/2-1/2"][SetUp "1"][FEN "1b6/7p/2p1NR2/4p3/4K3/2k2P2/6p1/8 w - - 0 1"]1.Nf4! {The only move} (1.Rg6?? hxg6 2.Nf4 g1=N {Black wins}) exf4 (1...g1=Q 2.Ne2+ Kd2 3.Nxg1 {White wins}) 2.Rg6 hxg6 {Stalemate}

Correct solutions:
Lucas, Joey - 10 points
Glyn - 2 points
Zach, Steven, Walter - 1 point

Comment: 

Absolute pins