## Question 1
What is the output if the following lists are given as input?

$list1$ = $1$ → $2$ → $3$ → $null$

$list2$ = $-1$ → $-2$ → $3$ → $null$
### Options

1. $3$ → $null$
Incorrect

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2. $-1$ → $-2$ → $3$ → $null$
Incorrect

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3. $-1$ → $-2$ → $1$ → $2$ → $3$ → $null$
Incorrect

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4. $-1$ → $-2$ → $1$ → $2$ → $3$ → $3$ → $null$
Correct
When we merge the given lists, the correct output is $-1$ → $-2$ → $1$ → $2$ → $3$ → $3$ → $null$. It includes all the elements of the `list1` and `list2` in a non-decreasing order.
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## Question 2
What is the output if the following lists are given as input?

$list1$ = $null$

$list2$ = $null$
### Options

1. The empty lists can't be merged.
Incorrect

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2. $null$
Correct
When we merge the two empty lists, the output is an empty list.
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## Question 3
What is the output if the following lists are given as input?

$list1$ = $0$ → $null$

$list2$ = $0$ → $null$
### Options

1. $null$
Incorrect

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2. $0$ → $null$
Incorrect

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3. $0$ → $0$ → $null$
Correct
When we merge the given lists, the correct output is $0$ → $0$ → $null$. It includes all the elements of the `list1` and `list2` in a non-decreasing order.
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4. $2$ → $null$
Incorrect

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