The correct Boolean operation represented by the circuit diagram drawn is :
AND
OR
NAND
NOR
When both A and B is closed there is no current flow through LED
That is
In all other cases output is 1
A B Y
0 0 1
0 1 1
1 0 1
1 1 0
NAND gate
Option 1)
AND
Option 2)
OR
Option 3)
NAND
Option 4)
NOR