6.
A:
Compound X signals to hydrolyze the NFAT promoter region to release GFP for giving green colour
B:
Compound X acted as antisense to blocked NFAT expression hence only GFP gets expressed and gives green colour
C:
Compound X signals to synthesize aromatic amino acid rich protein that gave overall green colour to the cells
D:
Compound X signals to translocate cells native NFAT to Nucleus leading to expression of GEP to given green colour
The answer is: D