Assertion (A): Mobile phones have penetrated the remotest areas of the country, and now almost everyone uses smartphones. Reason (R): Smartphones have replaced the older phones and all mobile companies are vying with each other to bring out better models.

• Both (A) and (R) are true, and (R) is the correct explanation of (A).
• Both (A) and (R) are true, but (R) is not the correct explanation of (A).
• (A) is true, but (R) is false.
• (A) is false, but (R) is true.