This paired question tests two independent historical relationships and requires both to be correct in the stated order. The answer turns on the exact role assigned in “The Amritsar session of INC in 1919 (after Jallianwala Bagh) was presided over by which leader?”. Evidence connecting Lala Lajpat Rai to that role is stronger than a general connection with the same war or movement. This development forms part of the changing national movement, in which constitutional negotiation, mass mobilisation, boycott, civil disobedience and revolutionary action followed different strategies; Exact dates and organisational decisions matter because related sessions or phases often performed different functions, a distinction applied here to Lala Lajpat Rai. Elimination is possible For statement two, the supported answer is Atal Bihari Vajpayee. India conducted Operation Shakti (Pokhran-II) - a series of 5 nuclear tests on 11 and 13 May 1998 at the Pokhran test site in Rajasthan during Prime Minister Atal Bihari Vajpayee's government. India then declared itself a nuclear weapons state. The tests led to international sanctions but significantly boosted India's strategic deterrence. Here Atal Bihari Vajpayee fits the complete historical coordinates supplied by “The Pokhran-II nuclear tests (Operation Shakti) conducted in May 1998 were carried out during whose premiership?”—the relevant actor, moment and outcome must all agree. This development forms part of the changing national Therefore the correct ordered pair is Lala Lajpat Rai followed by Atal Bihari Vajpayee. An option containing only one correct component must be rejected because the stem asks for a complete two-part match.