The fluid inside the nucleus is called:

1. Cytoplasm is the fluid outside the nucleus but inside the cell. 2. The fluid inside the nucleus is called nucleoplasm. 3. It contains chromatin, nucleoli and water. 4. So the answer is nucleoplasm. _Source: Selina Concise Biology ICSE Class 10, Ch 1 'Cell, the Structural and Functional Unit of Life'_