I saw your tweet and before I could respond, it disappeared. Can't find it @Ada_mummyya.
True, "and" was defined in Ogunyade v Oshunkeye (2013) as a conjunction. In light of Section 134(2)(b) of the Constitution 1999, we may have to rely on Onnoghen JSC

in our interpretation:
"AND" - It is a conjunction playing the role in grammatical construction of connecting words or phrases expressing the idea that the latter is to be added to or taken along with the first.

In its conjunctive sense, the word is used to conjoin words, clauses or sentences, expressing the relation of addition or connection and signifying that something is to follow in addition to that which proceeds and its use implies that the connected elements must be grammatically

co-ordinate as where the elements preceding and succeeding the use of the words refer to the same subject matter. See Black\'s Law Dictionary, Sixth Edition, at page 86"- Per Onnoghen JSC

If the Supreme Court's interpretation of "AND" serves as our guide, it then means that scoring 25% of votes cast in Abuja is an addition ground - thus mandatory