Query in regards to Full Value Consideration(Section 50C)

Where date of agreement and date of registration is not same and no such payment has been received by way of ECS, DD etc.
Then if '' Stamp Department Value'' shall not be taken therefore which value shall be considered as "Full Value Consideration "??

Supppse : where,
Sale Value : Rs. 120 Lacs
Stamp Dept.Value (Date of Agreement) : 150 Lacs
Stamp Dept. Value(Date of Registration) : 160 Lacs
Fair Market value : 155 Lacs
What will be Full Value Consideration?