With reference to Rudolf Virchow's contribution to the Cell Theory, consider the following statements: 1. He proposed the phrase 'Omnis cellula e cellula' in 1855, establishing that all cells arise from pre-existing cells. 2. His work gave the Cell Theory its final, modern shape by modifying the original hypothesis of Schleiden and Schwann. 3. He was the first scientist to discover that the cell nucleus is responsible for heredity. Which of the statements given above is/are correct?

Options:

• A: 1 and 3 only
• B: 2 and 3 only
• C: 3 only
• D: 1 and 2 only

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