Which of the following code blocks successfully connects to the neo$4$j database and removes all existing nodes and relationships. The following information is given:

The connection url is bolt:$//$localhost:$7687$

The username of the user is neo$4$j

The password of the database is password

The py$2$neo package has successfully been installed using pip install py$2$neo

Code block $1$

from py$2$neo import Graph

graph $=$ Graph$(\text{'}$bolt:$//$localhost:$7687\text{'},$ auth$=(\text{'}$neo$4$j$\text{'},$ 'password'$))$

graph.execute$(\text{'}$match $($n$)$ detach delete n$\text{'})$

Code block $2$

graph $=$ Graph$(\text{'}$bolt:$//$localhost:$7687\text{'},$ auth$=(\text{'}$neo$4$j$\text{'},$ 'password'$))$

graph.run$(\text{'}$match $($n$)$ detach delete n$\text{'})$

Code block $3$

from py$2$neo import Graph

graph $=$ Graph$(\text{'}$bolt:$//$localhost:$7687\text{'},$ auth$=(\text{'}$neo$4$j$\text{'},$ 'password'$))$

graph.execute$(\text{'}$match $($n$)$ delete n$\text{'})$

a$.$

Only code block $1$ is correct

b$.$

Only code block $3$ is correct

c$.$

None of the code blocks are correct

d$.$

Only code blocks $1$ and $3$ are correct

e$.$

Only code block $2$ is correct