2026 · Q21
Match List-I with List-II and select the answer using the codes given below the Lists:
List I (Symbol of Element):
- ASm,
- BCs,
- COs,
- DNp
List II (Group of Element):
- 1Transition Elements,
- 2Alkali Metals,
- 3Actinoid Elements,
- 4Lanthanoid Elements
General KnowledgeChemistry
- AA-4, B-2, C-1, D-3
- BA-4, B-1, C-2, D-3
- CA-3, B-1, C-2, D-4
- DA-3, B-2, C-1, D-4
Explanation
Samarium (Sm) is a lanthanoid (A-4), and caesium (Cs) is a Group 1 alkali metal (B-2). Osmium (Os) is a d-block transition metal (C-1), and neptunium (Np) is an actinoid (D-3). Only option A assigns each symbol to its correct element group. Every other option mismatches at least one element.