"We need a strength of 42 squadrons to carry out full spectrum operations, but it doesn't mean we can't fight a two-front scenario. There is a Plan B," he said at a press conference ahead of Air Force Day.
The Air Chief had been asked on Pakistan's recent boast of short-range nuclear weapons to counter India and also on the Doklam standoff that ended in August.

Air Chief BS Dhanoa said Chinese forces are still present in Tibet's Chumbi Valley.
Army chief General Bipin Rawat had said last month that the country should be prepared for a two-front war, stressing that China had started "flexing its muscles" and there seemed to be no scope for reconciliation with Pakistan, whose military and polity saw India as the adversary.
Air Marshal Dhanoa said the possibility of a two-front war in the current geopolitical scenario is low.
The Air Force is "ready for full spectrum operation", he said. The Air Force would achieve its sanctioned strength of 42 fighter squadrons by 2032.
Referring to the Doklam standoff, the Air chief said Chinese forces are still present in Tibet's Chumbi Valley and have not withdrawn completely.
"We expect them to withdraw," he said.
The Chumbi Valley is north of Doklam, where Indian and Chinese troops were locked in a lengthy standoff after India sent troops to stop China building a road. Doklam is remote, uninhabited territory claimed by both China and India's ally Bhutan.