Identify the similar address:

12, Lake View Road, Anna Nagar, Chennai - 600040

The correct option is 12 Lake View Rd Anna Nagar Chennai 600040.

To identify the correct and most similar address matching the original address, let us compare the given address details step-by-step:

Original Address: 12, Lake View Road, Anna Nagar, Chennai - 600040

Let us analyze the given choices:
1. 12 Lake View Rd Anna Nagar Chennai 600040: Contains all key components correctly including the house number (12), street name ("Lake View Rd", where "Rd" is a standard abbreviation for "Road"), locality ("Anna Nagar"), city ("Chennai"), and PIN code ("600040").
2. Anna Nagar, 12 Lake Road, Chennai: Changes "Lake View Road" to "Lake Road" and misses the PIN code.
3. 12 Lake Road, Chennai - 600004: Missing "Anna Nagar", changes "Lake View Road" to "Lake Road", and has an incorrect PIN code ("600004").
4. 21 Lake View Road, Anna Nagar, Chennai: Has an incorrect house number ("21" instead of "12") and is missing the PIN code.

Therefore, the first choice is the most accurate match to the original address.