The correct answer is option 2, Indonesia. In November 2005, warships from Indonesia arrived at Kochi on a goodwill visit. This means that the warships were visiting Kochi as a gesture of friendship and to enhance diplomatic relations between Indonesia and India.

Let`s examine the other options to understand why they are not the correct answers.

Option 1, China, is not the correct answer because it was warships from Indonesia, not China, that arrived in Kochi in November 2005.

Option 3, Russia, is also not the correct answer because the warships that arrived in Kochi in November 2005 were from Indonesia, not Russia.

Option 4, United Kingdom, is not the correct answer because the warships that visited Kochi in November 2005 were from Indonesia, not the United Kingdom.

In conclusion, the correct answer is option 2, Indonesia, as it was Indonesian warships that arrived in Kochi on a goodwill visit in November 2005.