Unfortunately options provided to the question are wrong...
refer this : https://questions.examside.com/past-years/year-wise/gate/gate-cse/gate-cse-1990/XD7yFvea5NWQTFJe/
Right options are :
Y= ABC + DE
Y= (ABC)' + (DE)'
Y= ABC . DE
Y= (ABC)' . (DE)'
*Referring to the "wired logic" connection, mentioned in this wiki page
A wired logic connection can create an AND or an OR gate. The limitations are the inability to create a NOT gate and the lack of level restoration.
*Then what we are left to wonder is what will be the logical choice between AND and OR in this scenario...(option B or D??), At this point I will agree with shaurya vardhan, here it's assumed to be AND by default as is hinted by this image in wikipedia :
Hence answer is option D) Y= (ABC)' . (DE)'
If anyone comes up with a reasonable explaination, please share...