Section 17 Patents Act 1970 prescribes that the patent specification shall be filed by the applicant in:

1. Section 9 Patents Act 1970 prescribes that where an application is accompanied by a provisional specification, a COMPLETE specification shall be filed within 12 months from the date of filing of the application; otherwise the application is deemed abandoned. 2. Section 10 Patents Act 1970 prescribes contents of specifications: (a) full description of invention; (b) best method of performing; (c) operative claim or claims; (d) abstract. 3. The complete specification must enable a person skilled in the art to work the invention (sufficient disclosure requirement under Section 10(4)). 4. Form 2 is the standard form prescribed under Patents Rules 2003 (now amended periodically). 5. Hence option B is correct. _Source: Patents Act 1970 / Copyright Act 1957 / Trade Marks Act 1999 (Bare Acts, IPIndia portal + Copyright Office) — Patents Act 1970, Section 9 read with Section 10; Patents Rules 2003 Form 2_