Arrange the following stages of the Leishmania donovani life cycle in the correct chronological sequence, starting from the point of transmission to a human host:\n1. Transformation of promastigotes into amastigotes inside macrophages.\n2. Inoculation of flagellated promastigotes into the skin by the sandfly.\n3. Binary fission of amastigotes leading to the rupture of the host cell.\n4. Phagocytosis of promastigotes by macrophages.\nSelect the correct answer using the codes given below:

Options:

• A: 2-1-4-3
• B: 1-2-4-3
• C: 2-4-3-1
• D: 2-4-1-3

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