[mohit.shurtugal]

I have two organic compounds

1. 1,3-dimethyl 4 [1,1 dimethyl ethyl] cyclohexane with the 2 methyl groups below the ring plane and the ethyl group above

2.1. 1,3-dimethyl 4 [1,1 dimethyl ethyl] cyclohexane with the 1 methyl group(POSTITON 3) below the ring plane and one methyl(POSITION 1) and the ethyl group above

WHICH HAS A HIGHER HEAT OF COMBUSTION AND WHY?

Please explain in detail

[mohit.shurtugal]

I got this problem in a Organic Chem Problem book for IIT JEE.
Am preparing for the exam.
there were four options and i narrowed it down to these two but cant figure it out after that..

[mohit.shurtugal]

please help