Which of the following choices fixes the capitalization or punctuation errors in the following sentence?

Sirius Black had to wear a polka-dotted shirt to the party; Also, he had to find his matching purple pants.

Sirius Black had to wear a polkadotted shirt to the party, also he had to find his matching purple pants.

Sirius Black had to wear a polkadotted shirt to the party: also he had to find his matching purple pants.

Sirius Black had to wear a polkadotted shirt to the party. Also, he had to find his matching purple pants.

Step 1 ：Compare the given sentences with the original sentence to find the one with the correct capitalization and punctuation.

Step 2 ：Original sentence: Sirius Black had to wear a polka-dotted shirt to the party; Also, he had to find his matching purple pants.

Step 3 ：Choices: ['Sirius Black had to wear a polkadotted shirt to the party, also he had to find his matching purple pants.', 'Sirius Black had to wear a polkadotted shirt to the party: also he had to find his matching purple pants.', 'Sirius Black had to wear a polkadotted shirt to the party. Also, he had to find his matching purple pants.']

Step 4 ：Compare each choice with the original sentence and find the correct one.

Step 5 ：\boxed{\text{Final Answer: Sirius Black had to wear a polkadotted shirt to the party. Also, he had to find his matching purple pants.}}