Transcriptionally active chromatin is called .......

Explanation

**Step-by-Step Solution:**

1. **Understanding Chromatin**: Chromatin is a complex of DNA and proteins found in the nucleus of eukaryotic cells. It exists in two forms: euchromatin and heterochromatin.

2. **Transcriptionally Active Chromatin**: When chromatin is described as transcriptionally active, it means that the DNA within that chromatin is being transcribed into RNA. This is a crucial process for gene expression.

3. **Identifying the Type of Chromatin**: The type of chromatin that is transcriptionally active is known as **Euchromatin**.

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