Step 1: Look for the odd one out:
Three of the statements describe the steps of Uddiyana Bandha: sitting well, exhaling fully, and pulling in the belly. One statement talks about the throat and chin, which are not part of a belly lock.
Step 2: Identify the misplaced step:
Throat contraction with the chin to the chest is the description of Jalandhara Bandha. The three bandhas are Mula Bandha (perineum), Uddiyana Bandha (abdomen) and Jalandhara Bandha (throat).
Step 3: Answer the negative question:
The question says "should not", so the answer is the statement that does not belong. That is option 1.
Final Answer:
Option 1 describes Jalandhara Bandha, so it should not be done here.
\[\boxed{1}\]