Consider the sets `varphi, ``A = {1, 3},``B = {1, 5, 9},`` C = {1, 3, 5, 7, 9}`Insert the symbol `sub`or ``between each of the following pair of sets : (i) `varphi dot dot dot B` (ii) `A dot dot dot

Explanation

To solve the problem, we need to determine the relationship between the given sets using the subset symbol (⊆) or the not a subset symbol (⊈). We will analyze each pair of sets step by step.

### Step-by-Step Solution:

1. **Identify the Sets:**
- Let \( \varphi \) be the null set (empty set).
- \( A = \{1, 3\} \)
- \( B = \{1, 5, 9\} \)
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