India Successfully Test Fired ‘Helina’ and 'Dhruvastra'

Current Context: India successfully test-fired indigenously-developed Anti-Tank Guided Missile (ATGM) systems 'Helina' and 'Dhruvastra'.

• This has led to their induction in the Indian Army and the Indian Air Force.
• The testing trials were conducted from the Advanced Light Helicopter at Pokhran deserts of Rajasthan.
• Both the ATGM systems are having the all-weather day-and-night capability. They can defeat battle tanks with a conventional armour and explosive reactive armour.
• The Helina ATGM is the Army version and Dhruvastra ATGM is the Air Force version.
• Both the ATGMs are designed and developed indigenously by the Defence Research and Development Organisation (DRDO).
• Static Part: 
• HQ of DRDO: New Delhi
• Chairman of DRDO: Dr G Satheesh Reddy

Question: 

Q.1 Recently, which of the following Anti-Tank Guided Missile (ATGM) systems were test-fired by India at Pokhran deserts of Rajasthan?
a. 'Helina'
b. 'Dhruvastra'
c. SANT Missile
d. Both (a) and (b)