Explanation
- A
3, 4, 2, 1
3, 4, 2, 1. Puts Chaitanya before Nanak.
- B
4, 3, 1, 2
4, 3, 1, 2. Starts with Kabir, after Namdev.
- C
3, 4, 1, 2
3, 4, 1, 2. Namdev → Kabir → Nanak → Chaitanya.
- D
4, 3, 2, 1
4, 3, 2, 1. Kabir first; Chaitanya before Nanak.
Summary. Official key is (c) 3, 4, 1, 2. Namdev, Kabir, Nanak, Chaitanya. Also note: Namdev — Varkari; 13th–14th c. Maharashtra; Kabir — 15th c.; nirguna; Nanak — 1469–1539; Sikhism; Chaitanya — 1486–1533; Gaudiya.
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