Club night mp pairs.
There is no alert of the double - implying that it is take-out. The lady on your left hesitates before her final pass. Before your lead, you inquire about the meaning of the double and she hesitates again, before telling you that she thinks that it shows a four-card heart suit.
You are familiar with the lady on your left and judge her to be competent, but are not familiar with the gentleman partnering her.
Your lead?
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Many BBO posters tell us that they don't promise 4+ ♥s, when they double ♠s, negatively.
Here declarer is more likely to hold ♠s. Nevertheless, I rank ...
1. ♠J At the table, I would have considered no other lead.
2. ♦3 Might work. FelicityR makes a good case.
3. ♥2 Possible because, with 4+ ♥s, South might rebid them.
4. ♣2 But North's 2N might be based on a ♣ fit,